Driving mechanism



muvme mscrmmsm File'd Nov. 3, 1958 2 Shets-Sheet 1 P. A. ABRAMOSKA Oct. 8, 1940.

-S F 6 MWN u oooo accus INVENTOR. 4 Paul A.AbramosKa 7w w ATTORNEY:-

III II Oct. 8, 1940.

P. A. ABRAMOSKA 2,217,037

DRIVING MECHANISM v Filed Nov. 3, 1938 2 Sheets-Shegt 2 I IN VENTOR.

Paul =A.AbramosKa 1M 1 (20M ATTORNEYS.

Patented Oct. 8, 1940 UNITED STATES PATENT, OFFICE I DRIVING MECHANISM Paul A. Abramoska, Parma, Ohio Application November 3, 1938, Serial No. 238,622 2 Claims. (01174-221) This invention relates to mechanism fordriving the shafts of metal-shaping rolls, and particularly to mechanism for driving rolls which are adapted to bend. or otherwise shape metal sheets It has for its general object to reduce the expense of mechanisms heretofore used for this purpose; to simplify greatly the mechanism employed for this purpose; and to insure comparatively quiet operationthereof. I accomplish the foregoing objects, and other objects which will be set forth hereinaftenin and through the construction and arrangement of parts shown in the drawings hereof, wherein Fig. 1 represents a side elevation, with certain parts broken away, of a machine by means of which my invention is practiced; Fig. 2 a vertical sectional view through said machine, taken on the line 22 of Fig. 1; Fig. 3 an enlarged detail in section taken on the line 33 of Fig. 1, whileFigs. 4-13 inclusive are views similar to Fig. 3 illustrating modifications of the driving mechanism shown in Figs. l3..

Describing the parts herein by reference char: acters, and first with. reference to Figs. 1-3 inclusive, If! denotes the bed of the machine, the same being supported by legs I I, 12 whichin turn support, beneath the bed, a base 14 which carries a motor, the housings of which are shown at [5, 16, the motor being provided with a shaft 111 which in turn drives a shaft (not shown) within the motor casing I6, said shaft having attached thereto an extension provided. with a sprocket hub 18. A worm drive is indicated as that employed for rotating the sprocket hub, such drive being preferred because of the fact that the parts will be driven at low speed.

A housing comprising an upper section 19 and a lower section 20 is secured to the bed II], by means of bolts 2| provided beneath the bed with nuts 2| and yieldable bushings 2|". Journaled in the upper housing section are shafts 22, each of said shafts being provided with metal shaping rolls 23 and 24 and with a sprocket gear 25 mounted thereon between the said rolls. J ournaled in the lower housing section are shafts 26, arranged directly beneath the shafts 22 and each carrying shaping rolls 23 and 24 complementary tothe rolls 23 and 24, respectively, and each being provided with a sprocket hub 21 located directly beneath the sprocket hub 25 on the shaft thereabove. In the embodiment of my invention shown in Figs. 1-3, each upper sprocket hub is a single sprocket, the teeth 25 whereof are arranged midway between the ends thereof while each sprocket 21 is a double sprocket, the teeth 21 of which are located adjacent to the ends of the hub.

The sprocket hub I8 is provided with a triple sprocket comprising a centrally arranged sprocket 3 and end sprockets I8.

28 denotes generally a triple sprocket chain comprising a middle chain member 28 and side chain members 28*, said members being adapted to be driven respectively by the sprockets l8 and i8 and to be received between and to en age the vertically opposed sprockets on'the shafts 22 and 2G. The sprockets and the rolls are secured to their respective shafts by ins 29'and 30, respectively; As illustrated herein, the middle chain member 28 is driven by themiddle sprocket 18 and engages the sprockets 25 on the hubs 25 while the side chain members are driven by the sprockets 18 and engage the sprockets 21 on the hubs. 21.

It will be noted that, by the construction shown and described, astraight-line drive is provided between the shafts 22 in the upper series and the shafts 26 in the lower series; also that a balanced driveof all of the shafts is provided by reason of the engagement of the side chain members with the side sprockets on the hubs 21 and the engagement of the middle chain member with the centrally located sprockets on the hubs 25. This arrangement insures smoothness of drive, with an economical and efficient installation. A contributoryfactor .to the smoothness of drive is the fact that the side chain members lead from .thesidedriving sprockets I8 to the first sprockets 21 in the lower train of sprockets and lead from the last sprockets of the lower train of sprockets to, the side sprockets of the drive sprocket. J The constructionshown and described herein is particularly applicable for use in driving rolls operating upon sheet metal, the drive possessing ample strength for accomplishing this object when the rolls are operated at the speeds customarily employed therewith.

.In Fig, 4 there is shown a modification of the drive illustrated in-Figs. 1-3, wherein a double sprocket chain is employed, driven bya double hub (not shown) 7 In this modification, each upper sprocket hub 25 is provided with a single sprocket 25 adjacent to its pin 29, while the sprocket hub 21 is provided with a sprocket 21 adjacent to the end thereof opposite its pin 29. The sprockets 25 and 21 are arranged so that the teeth thereof will be simultaneously engaged by the links of the sprocket chain members 28, 28.

With this construction, the chain members 28 and 28 are engaged simultaneously and respectively by sprocket teeth 25 and 21, whereby the upper and lower series of sprockets are driven. In Fig; 5 there is shown a further modification of my invention, wherein the upper sprocket hubs 25 are provided each with two centrally arranged sprockets 25, while each lower sprocket hub 21 is provided with sprockets 21 arranged adjacent to opposite ends thereof. The sprocket teeth on the two hubs are arranged so that the teeth thereof will be simultaneously engaged by the sprocket chain members, four of which are shown, the two outermost chain members 28 engaging the teeth on the sprockets 2'! while the two intermediate sprocket chains 28 engage the teeth on the sprockets 25% This arrangement also secures a balanced drive, such as is obtainable by the construction shown in Figs. 1-3.

In Fig. 6 there is shown a modification of my invention wherein only two sprocket chain members 28 and 28 are employed and wherein the sprockets 25 and 25 on the hubs 25 and the sprockets 2! and 2'! on the hubs 2! are so arranged that the teeth on the sprockets 25 are alined with the teeth on the sprockets 2'! while the teeth on the sprockets 25 are alined with the teeth on the sprockets 21. With this arrangement, the links of the chain members 28 and 28 are engaged simultaneously by the teeth of the sprockets 25 and 21 and also simultaneously by the teeth on the sprockets 25 and. 21*, the engagement of the chain members by the teeth of the sprockets 25 and 2'1 alternating with the engagement of the chain members by the teeth of the sprockets 25 and 21.

In Fig. 7 there is shown a further modification, wherein each sprocket hub 25 is provided with two externally arranged sprockets 25 and an intermediate sprocket 25 and each sprocket hub 21 is provided with two externally arranged sprockets 21 and an intermediate sprocket 21 The teeth on the sprockets 25 are transversely alined with the teeth on the sprockets 2'! and the teeth on the sprockets 25 are alined with the teeth on the sprockets 21 With this arrangement, the links of the outer chain members 28 and 28 are engaged simultaneously by the teeth on the sprockets 25 and 2'1 and also simultaneously by the teeth on the sprockets 2l and the teeth on the sphocket 25 the engagement of the chain members by the teeth on the sprockets 25* and 'l'l alternating with the engagement of the chain members by the teeth on the sprockets 25 and 21 In Fig.8 there is shown a still further modification of my invention which differs from that shown in Figs. 6 and 7 in that the sprocket hub 25 is provided with four sprockets 25 and the sprocket hub 2! is provided with four sprockets 2! while the chain comprises four members, namely, two side members 28 and two intermediate members 28*. The teeth on the sprockets are so arranged that links in the two side chain members will be engaged simultaneously by teeth on each of the two side sprockets on each hub while the two intermediate side chain members are engaged simultaneously by the teeth on the intermediate sprockets of each hub.

The construction described in Figs. 6, 7 and 8 affords a balanced drive between the sprockets on the shaft 22 and those on. the shafts 26, since one or more teeth on each of the sprockets are always in mesh with the chain. This insures smoothness as well as quietness of driving.

In Fig. 9 I have shown a construction wherein the shafts 22 and 26 may be driven by single sprockets and a single chain. In this view, each sprocket hub 25 and 21 is provided with a single sprocket 25 and 21 respectively, the teeth on one sprocket alternating with the teeth on the other sprocket. This enables me to use a single chain 28, the links whereof are adapted to be engaged alternately by the teeth on the sprockets 25 and 21 In Fig. 10, I have shown a modification which differs from that shown in Fig.9 only in the substitution of double sprockets 25 and 21 on the hubs 25 and 2'! for the single sprockets shown in the hubs in the preceding view and also in the substitution of two chain members 28 for the single chain member 28 in the former view. The teeth on the sprockets 25 are arranged to alternate with the teeth on the sprockets 21 in engaging the links of the chain members 28.

The construction shown in Fig. 11 differs from that shown in Fig. 10 in the employment of hubs 25 and 2'1 each having three sprockets 25 and 2N, respectively, thereon and the employment therewith of three chain members 28, the teeth on the sprockets being so arranged that the links on the chain members 28 will be alternately engaged by three teeth on each of the sprockets 25 and 21 The modification shown in Fig. 12 differs from that shown in Fig. 11 only. in the employment of four sprockets 2'5 and 2'! on each of the hubs 25 and 21 respectively, for the three sets of sprockets shown in the preceding view, and in the substitution of four chain members 28 for the three chain members shown in the preceding view. The teeth on the sprockets 25 alternate with the teeth on the sprockets 21 in engaging successively the links of the chain members '28 It will be evident that, in addition to the advantages pointed out hereinbefore, my driving mechanism will effect a material reduction in power cost, due to the absence therein of any idler and reversing shafts and the gears thereon.

Having thus described my invention, what I claim is:

1. In a sheet metal forming machine, the combination of a series of aligned shafts, asecond series of aligned shafts arranged parallel with and adjacent to the first series with the shafts of one series arranged directly opposite the shafts of the other series, a sprocket hub carried by each of said shafts, widely spaced sprockets carried by each of the hubs of one of said series of shafts, one or more sprockets carried by each of the hubs of the other series of shafts and arranged so as to be interposed intermediately of the first mentioned sprockets, a driving shaft, a sprocket hub thereon having sprockets spaced to cooperate with the sprockets on the first mentioned shafts, and a sprocket chain comprising sprocketchain members driven by the sprockets on the last mentioned hub and extending between and engageable by the sprockets on the hubs of the first mentioned shafts.

2. In the combination recited in claim 1, the series of shafts having the widely spaced sprockets on the hubs thereof being interposed between the driving shaft and the other series of shafts whereby the sprocket chain members driven by the widely spaced sprockets on the driving shaft hub will be engaged by and extend partially around the like spaced sprockets on the hubs of the first and last shafts in the series of shafts adjacent to the driving shaft.

PAUL A. ABRAMOSKA. 

